My Maid of Honor has been my best friend for over a decade. We are exceptionally close, but it is common knowledge that she does not take criticism well. If she's told that she's done something wrong or spoken to in a stern manner, she tends to breakdown and throw a fit. She was previously asked to be the Maid of Honor at her cousin's wedding, and the bride ended up removing her from the bridal party and uninviting her from the wedding (it was incredibly messy). I had always attributed it to the cousin being a bridezilla and never thought much about why it happened. And when my fiance proposed, I immediately called her and asked for her to be my Maid of Honor. She has been great at helping me figure out everything that needs to be done, but at the same time, she has been very vocal on her opinions. While I appreciate it, she's been expressing that things that I've always wanted in a wedding are "terrible" and "that my style choices are hideous". She also is furious that my fiance's sister is part of the bridal party. She even said that she was unhappy that she will stand next to her because "she was supposed to be the pretty one and I ruined that". Whenever I try to bring up that this isn't her wedding she gets very defensive and I can tell that she's about to make a fight out of it. What should I say? or how should I bring this up to her? Also, is there anyway that I could distinguish her as the Maid of Honor to help with her insecurity about my future sister in law?